Process of making soles for spring-heel shoes.



A. H. PRENZEL. PROCESS OF MAKING SOLES FOR SPRING HEEL SHOES. APPLICATION FILED 001212, 1912.

1, 1 05,694. Patented Aug. 4, 1914.

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ADAM H. PRENZEL, OF HALIFAX, PENNSYLVANIA,

ASSIGNOR TO UNITED SHOE IIIACHINERY COMPANY, 01'! PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

PROCESS OF MAKING SOLES FOR SPRING-HEEL SHOES.

Specification of Letters Patent.

Patented Aug". 4t, 1914.

Application filed October 12, 1912. Serial No. 725,480.

To all whom it may concern Be it known that I, Anna H. PRnNznL, a citizen of the United States, residing at Halifax, in the county of Dauphin and State of Pennsylvania, have invented certain Improvements in Processes of Making Soles for Spri11gl.-Ieel Shoes, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the sevc 'al figures.

This invention relates to shoes and to processes of making shoes and is particularly applicable to the preparation of a sole for use in the manufacture of a singlc-soled stitch-down shoe. In making stitch-down shoes which have a single sole, and particularly in making stitch-down shoes by the improved process of my co-pending application Scr. No. 725,476, filed Oct. 12, 1912, I have found it advantageous to provide the sole with a shoulder which will support the upper upon the inside of the shoe and prevent the upper from breaking away from the welt, as in the ordinary stitch-down shoe.

An object of this invention is an improved process of making a shouldered sole for stitch-down shoes which is particularly applicable to the manufacture of stitch-down shoes having spring heels.

A particular object of the invention is to produce a shouldered sole for a spring heel stitch-down shoe which will be perfectly smooth upon the inside of the shoe and which will present a neat appearance upon the outside of the shoe.

Other objects and features of the invention will appear from the following description and claims when considered in connection with the accompanying drawings, in which,-

Figure 1 is a perspective view showing a sole upon which the first step of the preferred order of steps for carrying out my process has been performed; Fig. 2 is a side elevation of the sole shown in Fig. 1. after the heel end of the sole has been split, the spring lift or underwedge has been inserted between the split parts of the heel. end and the sole has been sprung to bring its upper surface into one plane; Fig. 3 illustrates the completed sole after the shouldering operat-ion has been continued about the heel end of the sole; and Fig. 1- is a detail section of the sole showing the preferred form of the shoulder about the forepart of the sole.

ln carrying out the process of this invention, the preferred order of steps consists in shouldering the forepart of the solo from a point 2 at the front edge of the heel end of the solo upon one side to a point -lat the front edge of the heel end upon the other side, or vice versu, upon a channeling machine or by any other suitable means. This shoulder is preferably formed by cutting into the upper face of the sole close to the edge at an inclination to this face and turning up a lip (l in such manner that the lip overhangs the cut somewhat. An advantage of this form of shoulder is that when the shoe is made by the process described in my two-pending application Serial No. 725,476 horeinabove referred to, the angle of the upper may be tucked into the cut: ts beneath the overlmnging shoulder ti and the staples used to secure the upper in lasted condition may be inserted in the angle of the upper through the upper into the bottom of the said cut 8. I

The shoulder 6 having been formed, the heel end of the sole is split from the rear end substantially to the points 2 and 4- to form a thin lip 10 between which and the other part 12 of the split end of the heel a spring lift or underwedge 1 11 may be insorted, this under-wedge being tapered to a sharp edge at its forward end. The cut by which the heel end of the sole is split is preferably so located that the lip 10 is thin compared to the part 12 of the split end of the solo. The heel end of the sole having been split in the manner described, the underwedge 1 1: is inserted between the split parts of the heel end and is cemented firmly to both parts, and the sole thus formed is sprung at 1t; to bring its upper surface substantially into one plane.

After the underwedge has been inserted and secured in position between the parts it) and '12 and the sole has been sprungas at 16, the heel end of the sole is provided with a shoulder which will form a continuation of the shoulder (3 about the forepart and through the shank. This shoulder 18 upon the heel end of the sole is pre't'eraldy formed by cutting through the lip 10 and into the underwedge 14, the out being inclined downward from the outer edge of the sole so that the outer edge of the underwedge 1 is substantially of its original thickness. A convenient means for shouldering the heel end of the sole is a beveled rotary cutter which has its greatest diameter at its outer end.

It will be noted that the lip 10, being a continuation of the material of the upper face 90 of the forepart of the sole, forms a smooth bridge over the joint between the forward edge of the underwedge 14 and the forepart of the sole, and thus provides a smooth inside for the shoe. It will be noted further that the outer margin 22 of the underwedge is so located that the underwedge will be secured to the heel end of the sole by the stitches by which the welt and upper are secured to the sole. A shoe can thus be completed, if desired, without using any metallic fastenings, and in. any case without having any metallic fastenings upon the inside of the shoe where they are likely to come into contact with the foot. If desired, however, nails may be inserted in the spring 16 to prevent the solo from breaking down at this point and nails or slugs may be inserted through the margin 22 of the wedge and the corresponding portion of the heel end of the sole to resist the wear of these parts and to reinforce the attachment of these parts to each other and to the upper.

faving described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. The process of forming a shouldered sole for a spring heel shoe which consists in splitting the heel end of the sole, inserting a wedge between the split portions and then forming a shoulder in said sole extending about the heel end thereof.

2. The process of forming a shouldered sole for spring heel shoes which consists in splitting the heel end of a sole in such mannor that the upper lip of the split sole shall be comparatively thin, inserting a wedge between the lips and securing it in positlon, then forming a shoulder in said sole, extending about the heel end thereof, which shall cut through the upper lip and into the wedge.

8. The process of making a shouldered sole for spring heel shoes which consists in splitting the heel end of the sole, inserting a wedgebetween the split portions thereof, forming a spring in said sole to bring the upper surface of the heel end into substantially the same plane as the upper surface of the forepart of the sole, then forming a shoulder about the heel end of the sole eX- tending through the upper part of the split portion into the wedge.

a. The process of preparing a shouldered sole for a spring heel shoe which consists in forming in a sole a shoulder extending from the front of the heel end of the sole on one side through the shank and about the forepart to the front of the heel end of said sole on the other side, splitting the heel end of the sole and inserting a wedge and then forming a shoulder about the heel end of the sole.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ADAM H. PRENZEL. WVitnesses G. F. STILL, L. W. RYAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, K). 10. 

